Communication power supply fault alarm indicating lamp circuit, alarm method and communication power supply

Abstract

The invention discloses a communication power supply fault alarm indicating lamp circuit, an alarm method and a communication power supply, and relates to the technical field of communication power supply detection, the input end of a voltage monitoring circuit is connected with the output end of the communication power supply, the voltage monitoring circuit is used for monitoring the output voltage of the communication power supply, and the output end of the voltage monitoring circuit outputs a corresponding level according to the output voltage; the input end of the alarm trigger circuit is connected with the output end of the voltage monitoring circuit, the alarm trigger circuit is used for triggering a driving signal, and the output end of the alarm trigger circuit outputs a corresponding potential based on the output level of the voltage monitoring circuit; the first LED driving circuit and the second LED driving circuit are connected in parallel, the input ends of the first LED driving circuit and the second LED driving circuit are respectively connected with the output end of the alarm trigger circuit, and the corresponding LED indicating lamps are controlled to be electrified and lightened according to the corresponding potentials. The working state of the communication power supply is displayed only through single-path sampling, the circuit cost brought by single-chip microcomputer sampling is saved, and meanwhile the system reliability is improved through the isolation effect of the optocoupler.

Description

Technical Field

[0001] The present invention relates to the technical field of communication power supply detection, and in particular to a communication power supply fault alarm indicator light circuit and alarm method, and a communication power supply. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] In the communication system, the communication power supply is the key infrastructure of the entire system, and its stability and reliability are crucial to ensure the continuity and quality of communication services. When the communication power supply fails, such as when the output voltage is abnormal, timely and accurate alarm signals are issued, which is of great significance for maintenance personnel to quickly locate the problem and take corresponding measures to repair it.

[0004] In the field of communication power supply, many communication power supplies are in high voltage, high current, and high altitude environments. Due to problems such as high altitude operation and high voltage and high current, traditional handheld measurement methods cannot be used. In addition, due to excessive current and high frequency, the electromagnetic field where the power supply is located is chaotic. The use of single-chip microcomputers will not only increase costs, but also be interfered by strong magnetic fields, resulting in data disorder and abnormal indicator light display. This requires that the indicator light system can not only detect the voltage in real time, but also shield the external magnetic field. When the power supply output voltage is abnormal, an alarm will be issued to allow the user to replace the power supply in time. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a communication power supply fault alarm indicator light circuit and an alarm method, and a communication power supply. The circuit provided by the present invention performs single-channel sampling of the output voltage while ensuring accuracy, and improves system reliability and working durability by using optocoupler isolation control.

[0006] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0007] In a first aspect, the present invention provides a communication power supply fault alarm indicator circuit, comprising: a voltage monitoring circuit, an alarm trigger circuit, a first LED driving circuit and a second LED driving circuit;

[0008] The input end of the voltage monitoring circuit is connected to the output end of the communication power supply, the voltage monitoring circuit is used to monitor the output voltage of the communication power supply, and the output end thereof outputs a corresponding level according to the output voltage;

[0009] The input end of the alarm trigger circuit is connected to the output end of the voltage monitoring circuit, the alarm trigger circuit is used to trigger the drive signal, and the output end thereof outputs a corresponding potential based on the output level of the voltage monitoring circuit;

[0010] The first LED driving circuit and the second LED driving circuit are connected in parallel, and the input ends of the first LED driving circuit and the second LED driving circuit are respectively connected to the output end of the alarm trigger circuit, and the corresponding LED indicator lights are powered on according to the corresponding potential control.

[0011] Furthermore, the voltage monitoring circuit includes a first zener diode, a second zener diode, a third zener diode, a fourth zener diode and a first transistor; the output end of the communication power supply is respectively connected to the first end of the first zener diode and the first end of the second zener diode, the second end of the second zener diode is connected to the first end of the fourth zener diode, the second end of the fourth zener diode is connected to the first end of the third zener diode, the second end of the third zener diode is connected to the gate of the first transistor, the source of the first transistor is grounded, the drain of the first transistor is connected to the second end of the first zener diode, and is connected to the input end of the alarm trigger circuit.

[0012] Furthermore, the alarm trigger circuit includes a photocoupler, a first end of the photocoupler is connected to the output end of the voltage monitoring circuit, a second end and a third end of the photocoupler are grounded, and a fourth end is connected to a power supply and to the output end of the alarm trigger circuit.

[0013] Furthermore, the first LED driving circuit includes a second transistor, a first relay and a first LED indicator light, the base of the second transistor is connected to the output end of the alarm trigger circuit, the emitter of the second transistor is grounded, the collector of the second transistor is connected in series with the coil of the first relay and connected to a power supply, and the contacts of the first relay are connected in series with the first LED indicator light and connected to a power supply.

[0014] Furthermore, the second LED driving circuit includes a third transistor, a fourth transistor, a second relay and a second LED indicator light, the base of the fourth transistor is connected to the output end of the alarm trigger circuit, the emitter of the fourth transistor is grounded, the collector of the fourth transistor is connected to the base of the third transistor, the emitter of the third transistor is grounded, the collector of the third transistor is connected in series with the coil of the second relay and connected to a power supply, and the contacts of the second relay are connected in series with the second LED indicator light and connected to a power supply.

[0015] In a second aspect, the present invention provides an alarm method using a communication power supply failure alarm indicator circuit, comprising:

[0016] When the output voltage of the communication power supply changes, the voltage monitoring circuit outputs a corresponding level according to the output voltage;

[0017] receiving the corresponding level through an alarm trigger circuit, and outputting a corresponding potential based on the corresponding level;

[0018] The corresponding potentials are received respectively by the first LED driving circuit and the second LED driving circuit, and the corresponding LED indicator lights are controlled to be powered on based on the corresponding potentials.

[0019] Furthermore, when the output voltage of the communication power supply is 0V, the voltage monitoring circuit outputs a low level, the alarm trigger circuit outputs a high potential based on the low level, the first LED drive circuit is closed to short-circuit the first LED indicator light, and the second LED drive circuit is disconnected to light up the second LED indicator light.

[0020] Furthermore, when the output voltage of the communication power supply exceeds 60V, the voltage monitoring circuit outputs a low level, the alarm trigger circuit outputs a high potential based on the low level, the first LED drive circuit closes to short-circuit the first LED indicator light, and the second LED drive circuit disconnects to light up the second LED indicator light.

[0021] Furthermore, when the output voltage of the communication power supply is within the normal set voltage range, the voltage monitoring circuit outputs a high level, the alarm trigger circuit outputs a low potential based on the low level, the first LED drive circuit is disconnected so that the first LED indicator light is turned on, and the second LED drive circuit is closed so that the second LED indicator light is turned off.

[0022] In a third aspect, the present invention provides a communication power supply, including a communication power supply fault alarm indicator light circuit.

[0023] One or more of the above technical solutions have the following beneficial effects:

[0024] The present invention provides a pure hardware-based communication power supply fault alarm indicator circuit. In the field of communication power supply, due to high voltage, high current, and high altitude environments, and basically using a single-chip microcomputer for monitoring, this requires the system to have a certain anti-electromagnetic interference capability in addition to real-time voltage detection. When the power supply output voltage is abnormal, an alarm is issued to allow the user to replace the power supply in time. The circuit provided by the present invention not only ensures voltage accuracy, but also eliminates the need for single-chip microcomputer monitoring and control, reduces circuit cost, and improves system reliability and work durability.

[0025] The present invention uses only one sampling signal (i.e., single-channel sampling) to display the working status of the communication power supply. This method ensures that the indicator light is displayed normally while saving the circuit cost caused by single-chip microcomputer sampling. At the same time, the isolation effect of the optical coupler improves the reliability of the communication power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 is a circuit diagram of a first LED driving circuit and a second LED driving circuit of an indicator light circuit according to an embodiment of the present invention;

[0028] Figure 2 The invention discloses a circuit diagram of a voltage monitoring circuit and an alarm triggering circuit of an indicator light circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0032] Embodiment 1

[0033] like Figure 1 , Figure 2 As shown, this embodiment discloses a communication power supply failure alarm indicator circuit, including: a voltage monitoring circuit, an alarm trigger circuit, a first LED driving circuit and a second LED driving circuit;

[0034] The input end of the voltage monitoring circuit is connected to the output end of the communication power supply, the voltage monitoring circuit is used to monitor the output voltage of the communication power supply, and the output end thereof outputs a corresponding level according to the output voltage;

[0035] The input end of the alarm trigger circuit is connected to the output end of the voltage monitoring circuit, the alarm trigger circuit is used to trigger the drive signal, and the output end thereof outputs a corresponding potential based on the output level of the voltage monitoring circuit;

[0036] The first LED driving circuit and the second LED driving circuit are connected in parallel, and the input ends of the first LED driving circuit and the second LED driving circuit are respectively connected to the output end of the alarm trigger circuit, and the corresponding LED indicator lights are powered on according to the corresponding potential control.

[0037] In this embodiment, the voltage monitoring circuit includes a first Zener diode ZD1, a second Zener diode ZD2, a third Zener diode ZD3, a fourth Zener diode ZD4 and a first transistor Q1.

[0038] The output end of the communication power supply is respectively connected to the first end of the first Zener diode ZD1 and the first end of the second Zener diode ZD2, the second end of the second Zener diode ZD2 is connected to the first end of the fourth Zener diode ZD4, the second end of the fourth Zener diode ZD4 is connected to the first end of the third Zener diode ZD3, the second end of the third Zener diode ZD3 is connected to the gate of the first transistor Q1, the source of the first transistor Q1 is grounded, the drain of the first transistor Q1 is connected to the second end of the first Zener diode ZD1, and is connected to the input end of the alarm trigger circuit.

[0039] A third resistor R3 and a fourth resistor R4 are connected in series between the second end of the first voltage stabilizing diode ZD1 and the drain of the first transistor Q1, and are used to set the voltage of the optocoupler 1 pin so that the optocoupler has a suitable working current. A sixth resistor R6 is connected in series between the gate and the source of the first transistor Q1, and a fifth resistor R5 is connected in series between the gate of the first transistor Q1 and the second end of the third voltage stabilizing diode ZD3, and is used to change the gate voltage and provide a suitable working current to the transistor.

[0040] The above-mentioned voltage stabilizing diodes are connected to the output end of the communication power supply, and are mainly used to stabilize the voltage. The second voltage stabilizing diode ZD2, the fourth voltage stabilizing diode ZD4, and the third voltage stabilizing diode ZD3 connected in series can better stabilize the voltage and can be used as an overvoltage protection device to prevent other components in the circuit from being damaged due to overvoltage.

[0041] Preferably, the voltage parameter of the first Zener diode ZD1 is 40 V, the voltage parameters of the second Zener diode ZD2 and the fourth Zener diode ZD4 are 27 V, and the voltage parameter of the third Zener diode ZD3 is 5.1 V. The voltage parameter refers to the stable voltage of the Zener diode, which means the value at which the diode starts to conduct and stabilize the voltage when reverse biased.

[0042] Preferably, the resistance values ​​of the third resistor R3 and the fourth resistor R4 are 20K, the resistance value of the fifth resistor R5 is 1K, and the resistance value of the sixth resistor R6 is 10K.

[0043] Preferably, the first transistor Q1 may be a MOS tube of the type L2N7002LT1G, which may be flexibly selected according to actual conditions and is not specifically limited in this embodiment.

[0044] In this embodiment, the alarm trigger circuit includes a photocoupler U1, a first end of the photocoupler U1 is connected to the output end of the voltage monitoring circuit, a second end and a third end of the photocoupler U1 are grounded, and a fourth end is powered by a 15V regulator provided by an external power supply and connected to the output end DC_0K of the alarm trigger circuit.

[0045] The fourth terminal of the photocoupler U1 is powered by a 15V regulator provided by a power supply, and a first resistor R1 is connected in series between the fourth terminal and the power supply to limit the current flowing into the fourth terminal.

[0046] Preferably, the resistance of the first resistor is 10K.

[0047] Preferably, the photoelectric coupler U1 may be of model EL1019(TA)-VG, which may be flexibly selected according to actual conditions and is not specifically limited in this embodiment.

[0048] In this embodiment, the first LED driving circuit includes a second transistor Q2, a first relay K1 and a first LED indicator light D1, the base of the second transistor Q2 is connected to the output end DC_0K of the alarm trigger circuit, the emitter of the second transistor Q2 is grounded, the collector of the second transistor Q2 is connected in series with the coil of the first relay K1 and connected to a power supply, and the contacts of the first relay K1 are connected in series with the first LED indicator light D1 and connected to a power supply.

[0049] A seventh resistor R7 is connected in series between the base of the second transistor Q2 and the output terminal DC_0K of the alarm trigger circuit to limit the base current of the transistor. A ninth resistor R9 is connected in series between the base of the second transistor Q2 and the ground terminal to pull the base of Q2 down to a lower position so that the transistor can be turned on and off easily.

[0050] The collector of the second triode Q2 is connected in series with the fourth diode D4 and then connected to the power supply. Specifically, the collector of the second triode Q2 is connected to the anode of the fourth diode D4, and the cathode of the fourth diode D4 is connected to the power supply. The power supply is connected in series with the first capacitor C1 and then grounded. Specifically, the power supply is connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 is grounded to reduce the influence of noise and interference on the circuit.

[0051] The collector of the second transistor Q2 is connected to the first end of the coil of the first relay K1, the fourth end of the coil of the first relay K1 is connected to the power supply, the second end of the contact of the first relay K1 is connected to the cathode of the first LED indicator D1, and the anode of the first LED indicator D1 is connected to the power supply. Whether the first LED indicator D1 is powered can be controlled by the first relay K1.

[0052] An eleventh resistor R11 is connected in series between the cathode of the first LED indicator light D1 and the second end of the contact of the first relay K1, and is used to control the LED current to enable it to work normally.

[0053] Preferably, the resistance of the seventh resistor R7 is 2K, the resistance of the ninth resistor R9 is 10K, and the resistance of the eleventh resistor R22 is 10K; the first capacitor C1 is 1NF / 50V.

[0054] Preferably, the second transistor Q2 can be of S9013 type, the fourth diode D4 can be of 1N4007 type, and the first relay K1 can be of HF32FV-G / 12-HSTF type. They can be flexibly selected according to actual conditions and are not specifically limited in this embodiment.

[0055] In this embodiment, the second LED driving circuit includes a third transistor Q3, a fourth transistor Q4, a second relay K2 and a second LED indicator D2, the base of the fourth transistor Q4 is connected to the output end DC_0K of the alarm trigger circuit, the emitter of the fourth transistor Q4 is grounded, the collector of the fourth transistor Q4 is connected to the base of the third transistor Q3, the emitter of the third transistor Q3 is grounded, the collector of the third transistor Q3 is connected in series with the coil of the second relay K2 and connected to the power supply, and the contacts of the second relay K2 are connected in series with the second LED indicator D2 and connected to the power supply.

[0056] A fourteenth resistor R14 is connected in series between the base of the fourth transistor Q4 and the output terminal DC_0K of the alarm trigger circuit. A third capacitor C3 is connected in series between the base of the fourth transistor Q4 and the ground terminal to stabilize its base level so that it can be shut down normally.

[0057] An eighth resistor R8 is connected in series between the base of the third transistor Q3 and the collector of the fourth transistor Q4 to limit the base current of Q3. A tenth resistor R10 is connected in series between the base of the third transistor Q3 and the ground terminal to lower the base level of Q3.

[0058] The collector of the third triode Q3 is connected in series with the third diode D3 and then connected to the power supply. Specifically, the collector of the third triode Q3 is connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to the power supply. The power supply is connected in series with the second capacitor C2 and then grounded. Specifically, the power supply is connected to the first end of the second capacitor C2, and the second end of the second capacitor C2 is grounded to reduce noise and interference of the circuit.

[0059] The collector of the third transistor Q3 is connected to the first end of the coil of the second relay K2, the fourth end of the coil of the second relay K2 is connected to the power supply, the second end of the contact of the second relay K2 is connected to the cathode of the second LED indicator D2, the anode of the second LED indicator D2 is connected to the cathode of the first LED indicator D1, and the anode of the first LED indicator D1 is connected to the power supply. Whether the second LED indicator D2 is powered can be controlled by the second relay K2.

[0060] A second resistor R2 is connected in series between the cathode of the second LED indicator light D2 and the second end of the contact of the second relay K2, and is used to control the current flowing through the LED to enable it to work normally.

[0061] Preferably, the resistance of the fourteenth resistor R14 is 1K, the resistance of the second resistor R2 and the tenth resistor R10 is 10K, the resistance of the eighth resistor R8 is 2K; and the second capacitor C2 is 1NF / 50V.

[0062] Preferably, the third transistor Q3 adopts the S9013 model, the fourth transistor Q4 adopts the MMBT5551 model, the third diode D3 can adopt the 1N4007 model, and the second relay K2 can adopt the HF32FV-G / 12-HSTF model. Flexible selection can be made according to actual conditions, and this embodiment does not make specific limitations.

[0063] While ensuring voltage accuracy, the above circuit uses an optocoupler isolation control solution, eliminating the need for single-chip microcomputer monitoring and control, reducing circuit costs, and improving system reliability and working durability.

[0064] Embodiment 2

[0065] This embodiment discloses an alarm method using a communication power failure alarm indicator circuit, including:

[0066] When the output voltage of the communication power supply changes, the voltage monitoring circuit outputs a corresponding level according to the output voltage;

[0067] receiving the corresponding level through an alarm trigger circuit, and outputting a corresponding potential based on the corresponding level;

[0068] The corresponding potentials are received respectively by the first LED driving circuit and the second LED driving circuit, and the corresponding LED indicator lights are controlled to be powered on based on the corresponding potentials.

[0069] In this embodiment, when the output voltage of the communication power supply is 0V, the voltage monitoring circuit outputs a low level, the alarm trigger circuit outputs a high potential based on the low level, the first LED drive circuit is closed to short-circuit the first LED indicator light, and the second LED drive circuit is disconnected to light up the second LED indicator light.

[0070] Specifically, the output voltage of the communication power supply is 0V, including short circuit protection, overload protection, and output undervoltage protection of the communication power supply.

[0071] (1) Short circuit protection

[0072] In this circuit, after the output short circuit protection of the communication power supply: the output voltage of the communication power supply (the normal output of the communication power supply is 48-56V) drops to 0V, at this time, the first voltage stabilizing diode ZD1 is cut off, the first end and the second end of the photoelectric coupler U1 are (1-2 pin) low level, and the fourth end and the third end (4-3 pin) of the photoelectric coupler U1 are not conducting. The output end DC_0K of the alarm trigger circuit is at a high potential at this time, the second transistor Q2 and the fourth transistor Q4 are turned on, and the third transistor Q3 is cut off because the base level of the fourth transistor Q4 is turned on and pulled down, and then the second relay K2 is disconnected. The first relay K1 is energized and closed due to the conduction of the second transistor Q2, and the first LED indicator D1 (green light) and the eleventh resistor R11 are short-circuited. At this time, the second LED indicator D2 and the second resistor R2 form a series circuit, and the second LED indicator D2 is energized and lit (red light is lit).

[0073] (2) Overload protection

[0074] In this circuit, after the output short circuit protection of the communication power supply: the output voltage of the communication power supply (the normal output of the communication power supply is 48-56V) drops to 0V, at this time, the first voltage stabilizing diode ZD1 is cut off, the first end and the second end of the photoelectric coupler U1 are (1-2 pin) low level, and the fourth end and the third end (4-3 pin) of the photoelectric coupler U1 are not conducting. The output end DC_0K of the alarm trigger circuit is at a high potential at this time, the second transistor Q2 and the fourth transistor Q4 are turned on, and the third transistor Q3 is cut off because the base level of the fourth transistor Q4 is turned on and pulled down, and then the second relay K2 is disconnected. The first relay K1 is energized and closed due to the conduction of the second transistor Q2, and the first LED indicator D1 (green light) and the eleventh resistor R11 are short-circuited. At this time, the second LED indicator D2 and the second resistor R2 form a series circuit, and the second LED indicator D2 is energized and lit (red light is lit).

[0075] (3) Output undervoltage protection

[0076] In this circuit, after the output short circuit protection of the communication power supply: the output voltage of the communication power supply (the normal output of the communication power supply is 48-56V) drops to 0V, at this time, the first voltage stabilizing diode ZD1 is cut off, the first end and the second end of the photoelectric coupler U1 are (1-2 pin) low level, and the fourth end and the third end (4-3 pin) of the photoelectric coupler U1 are not conducting. The output end DC_0K of the alarm trigger circuit is at a high potential at this time, the second transistor Q2 and the fourth transistor Q4 are turned on, and the third transistor Q3 is cut off because the base level of the fourth transistor Q4 is turned on and pulled down, and then the second relay K2 is disconnected. The first relay K1 is energized and closed due to the conduction of the second transistor Q2, and the first LED indicator D1 (green light) and the eleventh resistor R11 are short-circuited. At this time, the second LED indicator D2 and the second resistor R2 form a series circuit, and the second LED indicator D2 is energized and lit (red light is lit).

[0077] (4) Output overvoltage protection

[0078] In this embodiment, when the output voltage of the communication power supply exceeds 60V, the voltage monitoring circuit outputs a low level, the alarm trigger circuit outputs a high potential based on the low level, the first LED drive circuit closes to short-circuit the first LED indicator light, and the second LED drive circuit disconnects to light up the second LED indicator light.

[0079] Specifically, output overvoltage protection: In this circuit, when the output of the communication power supply is overvoltage, the voltage of the communication power supply (the normal output of the communication power supply is 48-56V) rises to above 60V, at which time the second voltage zener diode ZD2, the third voltage zener diode ZD3, and the fourth voltage zener diode ZD4 are reversely broken down, and when the VGS of the first transistor Q1 is greater than the threshold voltage, the first transistor Q1 is turned on DS. Since Q1 is turned on, the 1-2 pins of the photocoupler U1 are pulled down to a low potential, and the 4-3 pins of the photocoupler U1 are not turned on. The output terminal DC_0K of the alarm trigger circuit is a high potential at this time, the second transistor Q2 and the fourth transistor Q4 are turned on, and the third transistor Q3 is turned off because the base level of the fourth transistor Q4 is turned on, and then the second relay K2 is disconnected. The first relay K1 is energized and closed due to the conduction of the second transistor Q2, short-circuiting the first LED indicator D1 (green light) and the eleventh resistor R11. At this time, the second LED indicator D2 and the second resistor R2 form a series circuit, and the second LED indicator D2 (red light is on).

[0080] (5) Normal output

[0081] In this embodiment, when the output voltage of the communication power supply is within the normal set voltage range, the voltage monitoring circuit outputs a high level, the alarm trigger circuit outputs a low potential based on the low level, the first LED drive circuit is disconnected so that the first LED indicator light is turned on, and the second LED drive circuit is closed so that the second LED indicator light is turned off.

[0082] Specifically, when the communication power supply is output normally, the first voltage stabilizing diode ZD1 is reversely broken down, the 1-2 pin of the photoelectric coupler is high level, and the 4-3 pin is turned on. At this time, the output terminal DC_0K of the alarm trigger circuit is pulled down to a low potential, the second transistor Q2 and the fourth transistor Q4 are turned off, the third transistor Q3 is turned on, and then the first relay K1 is disconnected. The second relay K2 is energized and closed due to the conduction of the third transistor Q3, and the second LED indicator D2 (red light) is short-circuited. At this time, the first LED indicator D1 and the eleventh resistor R11 form a series circuit, and the first LED indicator D1 (green light is on).

[0083] Through the above process, only one sampling signal is used to display the working status of the communication power supply. This method ensures the normal display of the indicator light while saving the circuit cost caused by the microcontroller sampling. At the same time, the isolation effect of the optocoupler improves the system reliability.

[0084] Embodiment 3

[0085] This embodiment discloses a communication power supply, including a communication power supply fault alarm indicator light circuit.

[0086] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0088] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A communication power supply failure alarm indicator light circuit, characterized in that: include: A voltage monitoring circuit, an alarm triggering circuit, a first LED driving circuit and a second LED driving circuit; The input end of the voltage monitoring circuit is connected to the output end of the communication power supply, the voltage monitoring circuit is used to monitor the output voltage of the communication power supply, and the output end thereof outputs a corresponding level according to the output voltage; The input end of the alarm trigger circuit is connected to the output end of the voltage monitoring circuit, the alarm trigger circuit is used to trigger the drive signal, and the output end thereof outputs a corresponding potential based on the output level of the voltage monitoring circuit; The first LED driving circuit and the second LED driving circuit are connected in parallel, and the input ends of the first LED driving circuit and the second LED driving circuit are respectively connected to the output end of the alarm trigger circuit, and the corresponding LED indicator lights are powered on according to the corresponding potential control.

2. A communication power supply failure alarm indicator light circuit as claimed in claim 1, characterized in that: The voltage monitoring circuit includes a first zener diode, a second zener diode, a third zener diode, a fourth zener diode and a first transistor; the output end of the communication power supply is respectively connected to the first end of the first zener diode and the first end of the second zener diode, the second end of the second zener diode is connected to the first end of the fourth zener diode, the second end of the fourth zener diode is connected to the first end of the third zener diode, the second end of the third zener diode is connected to the gate of the first transistor, the source of the first transistor is grounded, the drain of the first transistor is connected to the second end of the first zener diode, and is connected to the input end of the alarm trigger circuit.

3. A communication power supply failure alarm indicator light circuit as claimed in claim 1, characterized in that: The alarm trigger circuit comprises a photoelectric coupler, a first end of the photoelectric coupler is connected to the output end of the voltage monitoring circuit, a second end and a third end of the photoelectric coupler are grounded, and a fourth end is connected to a power supply and to the output end of the alarm trigger circuit.

4. A communication power supply failure warning indicator light circuit as claimed in claim 1, characterized in that: The first LED driving circuit includes a second transistor, a first relay and a first LED indicator light, the base of the second transistor is connected to the output end of the alarm trigger circuit, the emitter of the second transistor is grounded, the collector of the second transistor is connected in series with the coil of the first relay and connected to a power supply, and the contacts of the first relay are connected in series with the first LED indicator light and connected to a power supply.

5. A communication power supply failure warning indicator light circuit as claimed in claim 1, characterized in that: The second LED driving circuit includes a third transistor, a fourth transistor, a second relay and a second LED indicator light, the base of the fourth transistor is connected to the output end of the alarm trigger circuit, the emitter of the fourth transistor is grounded, the collector of the fourth transistor is connected to the base of the third transistor, the emitter of the third transistor is grounded, the collector of the third transistor is connected in series with the coil of the second relay and connected to a power supply, and the contacts of the second relay are connected in series with the second LED indicator light and connected to a power supply.

6. An alarm method using a communication power failure alarm indicator circuit, characterized in that: include: When the output voltage of the communication power supply changes, the voltage monitoring circuit outputs a corresponding level according to the output voltage; receiving the corresponding level through an alarm trigger circuit, and outputting a corresponding potential based on the corresponding level; The corresponding potentials are received respectively by the first LED driving circuit and the second LED driving circuit, and the corresponding LED indicator lights are controlled to be powered on based on the corresponding potentials.

7. The alarm method using the communication power failure alarm indicator circuit as claimed in claim 6, characterized in that: When the output voltage of the communication power supply is 0V, the voltage monitoring circuit outputs a low level, the alarm trigger circuit outputs a high potential based on the low level, the first LED drive circuit is closed to short-circuit the first LED indicator light, and the second LED drive circuit is disconnected to light up the second LED indicator light.

8. The alarm method using the communication power failure alarm indicator circuit as claimed in claim 6, characterized in that: When the output voltage of the communication power supply exceeds 60V, the voltage monitoring circuit outputs a low level, the alarm trigger circuit outputs a high potential based on the low level, the first LED drive circuit is closed to short-circuit the first LED indicator light, and the second LED drive circuit is disconnected to light up the second LED indicator light.

9. The alarm method using the communication power failure alarm indicator circuit as claimed in claim 6, characterized in that: When the output voltage of the communication power supply is within the normal set voltage range, the voltage monitoring circuit outputs a high level, the alarm trigger circuit outputs a low potential based on the low level, the first LED drive circuit is disconnected to light up the first LED indicator, and the second LED drive circuit is closed to turn off the second LED indicator.

10. A communication power supply, characterized in that: The invention comprises a communication power supply failure alarm indicator light circuit.

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